Improvement in knob-latches



E.PARKER Knob-Latches.

No.I35J47.

Patented Jan. 21,187 3 WITNESSES.

FIG-2- INVEN TOR.

AM. ma ro-uruosmrum on ma (nssanms's mosses) UNITED STATES PATENTOFFICE.

EMERY PARKER, OF NEW BRITAIN, CONNECTICUT, ASSIGNOR TO THE BUS- SELL ANDERWIN MANUFACTURING COMPANY, OF SAME PLACE.

IMPROVEMENT IN KNOB-LATCHES.

Specification forming part of Letters Patent No. 135,147, dated January'21, 1878.

To all whom it army-concern:

Be it known that I, EMERY PARKER, of New Britain, in the county ofHartford and State of Connecticut, have invented a new and usefulImprovement in Rim-Locks; and I do hereby declare that the followingspecification, taken in connection wit-h the drawing making a part ofthe same, is a full, clear, and exact description thereof.

Figurel is a side elevation. Fig. 2is partly an end view and partly aview in section. Fig. 3 shows in perspective the special subject ofimprovement.

In rim-locks, or those locks or latches which are placed upon the stileof the door instead of being set in a mortise therein, some provision isnecessary to support and sustain the shank of the knob against theeffect of lateral strains. If such support be cast upon the case of thelock it becomes a difficult matter, in locks of the higher style offinish, to finish up the cases properly without a considerableexpenditure .of labor. Especially is this true in the case of car-locks,which are ornamented with fancy designs in relief.

My invention resides in casting or otherwise securin g asupportingcollar for the knob-shank upon the hub or follower, whichshall, when the hub is in place in the case, project beyond the outerface of the case sufficiently far to receive and support the knob-shank,whereby I am enabled to dress off the case by planing, grinding, orother mechanical means, with a comparatively trifling expense to thatwhich would be necessary if the supporting-collar formed a part of thecase itself.

A, Figs. 1 and 2, represents one of the many forms of rim-lock cases. B,Fig. 3, is the hub or follower, provided with arms a a for operating thehorseshoe-plate C, shown in dotted lines at Fig. 1. I make this hub witha collar, D, which is intended to pass through a cylindrical hole orjournal-bearing for the hub in the face-wall of the case. The length ofthis collar is sufficient to extend beyond the face of the case therequisite distance to give the necessary support to the shank of theknob; and the-interior diameter of the collar is of the size which isproper to nicely receive the shank. The opposite. end of the hub isentered in the journal-bearin g in the inner wall, as seen at Fig. 2, inthe same way.

It is obvious that before the parts of the lock or latch are assembledthe face of the case can be dressed off with entire facility by theusual machine-tools.

What I claim as my invention, and desire to secure by Letters Patent,is-

That improvement in rim-locks which consists in constructing the hub orfollower B with a shank-support, D, for the knob and combining the samewith the lock-case A, substantially as described, for the purposesspecified.

EMERY PARKER.

Witnesses M. J. WooDnUrF, LEONARD Dore.

